This is a discussion on Gas Mileage FAQ within the Everyday Impreza Talk forums, part of the Community - Meet other Enthusiasts category; Originally Posted by RayfieldsWRX
Indeed.
I am, however, the Priest of the Temple of Syrinx.
And I am the analog ...

I drive mostly highway (about 15 mile commute to work) which does include a little bit of city driving (> 1 mile). I re-set my trip every time I get gas and I generally average 25.8 - 26.7 according to the computer's MPG. I generally drive softly to and from work and almost always have fun around the weekend.

We'll see how it goes when the weather warms up. I'm not really complaining; 24mpg average since September isn't bad for a car that's seeing 19psi of boost every time it's driven.
..

I'll up the ante a bit, I'm a data geek, I work with data all day, every day so I had an Access database for my old car, gas vs temperature graph for the nerd in me. I just realized I didn't do any statistics or linear regression...

Nicely done! Now I want to go buy a calibrated thermometer so that I can get that data point when I fill up!

You can keep the title of Graphinator

I downloaded the weather data, can't recall what website, but it had daily historic data for most major cities. Then I just built a query that matched the fill up dates with the temp that day. It was a pretty rad database

not sure about the extensive write up, but in my opinion: spark plugs up to date, tire psi, where u buy the fuel(sunoco has the best quality here in pa, and hess has the worst fyi), and maintaining a steady throttle(dont slow down /speed up constantly etc.) and i definately agreee with the "dont leave uneccicary crap in car" aspect.(my wife used to b*tch about mpg's so i took all the crap out of the car and the springs raised up like two inches there was so much crap!!!)

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